Air chuck



J. W. PRICE Aug. 19, 1924.

AIR CHUCK 2 Shuts-Sheet 1 Filed March 22 1923 o L W WITNESSES A TTOR-NE VS Patented Aug. 19, 1924.

JAMES w. PRICE; OF TULSA; okLAHoi/iii, AssIeiq or; Tomlin 'iutse nvnniion ooivi- TPA'NY, or TULSA, OKLAHOMA, a OOB/EQEATION on OKLAHOMA.

Am outwit.

w \I 1 i i Application filed March 22, 1923. Serial No. 626,994.

To all whom itlm'dy ooh o ef n; t, I

Be it known that I, JAMES W. Peron, a citizenof the-United States, and a resident Off Tiilsa, in the county o'f Tulsa'ahd State of Oklahoma, have finye 'ted certain new and, useful Improvenient's in Air, Chucks,

of which the following isia specification.

a invention, relates to improvements in Lei vii sz e mb ly, knownas r. chuc mdp i 'e C IiIS iH' QI Om atioii's frnode ot operation herein described and ela'imem t W An bject of the in ,ention is toflprovide 'a ilih h ki hil lh nread yl i se f any desired pressure of air with Whichit is d red 1 9.51 1: a tire, th release 0? r wh occurs when saidpres'sure isreachedbeing a arning to the operator to remove the chuck from the valve tube of thetirel Another oloje'ct o f theinventionis to provide an, air chuck vvhi'ch has a spring bar in the shape of a slide which is adapted to be moved by a hand piece for the adjust- A inent of the chuck to various degrees of pressure 'at which afpressure release is desired to be had. 5

Other obiects and e v mge wiu a pear the following specification, reference being had to the accompanying drawings,

in which;

Fig. 1 1s a s1de elevation on the improved airchuck, I

front end vieiqv,

F'g-ZT c it a h Fig. 3 is a longitudi al section ofthe air '35 chuck, I I 1 I p 7 v, Fig. 41s a cross section onthe line H Fig '5 is a cross section on the line 5 5 4'0 Fig. i's a detail section of the chuck head shotvingthe position of the plug valve when applied to a valve tube, is I d Fig. 7 is a detail cross section on the line Fig.8 isa detail 4 Ian vieiiv of the gradumed sp ng a so Fig. Q is adeta'il perspective view of the metal Bushing which is situated in the cheek head. i

The construction comprises the stay 1 which is cylindrical for the major part of its length but is inade square at 2 adjacent to the place Where it inei'ges intov the head 3.

t e aynnariea ody 1 eammates in e neg- 21c a which is suitably threaded a 5 for the "the clinch should. he r'e'inoved;

connection ofan air hose with which the air chuck isintended to be usedin combination. A.'cy1indrical chamber 6 running length- Wise of the'body l cointains a spring? which isfadapted to press against the heel 8 of a slide or spring bar v9.

A slot-1Qextendingpartof the length of the body 1 perinits the sliding n ovementot the spring bar in the setting of the 'latterlfor varioits tire air presslures. spring bar itself moves in a gifo'o've 1 1 on topot' the body 1, andobvioiisly both thelength of the slot 10 and of the groove ll sierve'to limit the amount of extensible movement of the spring bar 9 in respect to a hand piecedgby which it is adjusted. The hand piece :has internal threads 13 which have engagement with threads 14; on the spring liar.v By turning the hand piece I (toward the right for eX- j.

ample) the spring bar 9 is advanced from beneath the hand piece and the groove By virtue of the fact that the heel engages the springf, the reader can readily see that thek adjustmentor advancement of the spring bar 9 Will, increase the tension of the spring, This'spring bears against an escape valve 15 andthe greater the tension of the pri g against this valve, the greater willthe air pressure have to be in order to unsea the valve for the escape of air. 7 p Graduations 16 on top of the spring bar 9 serve to designate the various pressures for which the chuck may be set. ,Thesegrad uasure of airn ust be present in the tire to loverc l th ten -e Offih in fetfih i i'nseating of the valve l5. When this valve 'nn its the airescapes at a port 17 with a 11 1g sound, serving asa Warning that the tire is. filled. to the required presnre and that eons 18 has' t 19, aven e "which stress"20, pasj1n o'rjdrio provide a fasteniiig against the collar intended to be heldin oi'ne'place. It carries a screw 21 the sniooth shank; of Whicho'ccupies an annulaf groove 22-in the adjacent and of the hendtp'ieee ieg This ea gagemene the seewwith the grate provides sv'viveljoint ,tions are accompanied by pressure indicainc ' vides a seat for the valve 15.

protuberance of-the gasket 25 fits.

various recesses 35 and 36 in place.

ment thereof. As stated before, the rotation of the hand piece 12 moves the spring bar 9 back and forth in the groove 11. The front wall 23 of the collar 18 adjacent to the groove 11 serves as a pointer in reference to which the graduations 16 are to be moved in fixing the desired adjustments of the spring bar. A valve set screw, 24 is fitted into the body 1 from the front of the non-circular portion 2 of the head. This screw bears against a gasket 25 which not only makes a tight joint around the thread. of the screw, but also pro- This valve has a depression 26 in which a corresponding The head of the .screw 24 bears against a gasket 27 which makes an air-tight joint at this point. A' passage 28 through the set screw 24 offers communication between the escape valve 15 and the bore 29 in the head 3. A part of this passage runs along the axis of the screw but another part turns at right angles and enters an annular groove 30. The purpose of this groove is to insure the aforesaid communication regardless of the particular position into which the right angled portion may be turned in tightening the screw. A metal bushing 31 is fitted into the head 3 from beneath. This bushing has a plurality of steps 32, 33 and 34 of successively decreasing diameters. The step 33 occupies part of a recess 35 in the head 3, while the step 34 occupies part of a recess 36. The

latter recess also contains a gasket 37 against which the head 38 of the valve plug 39 bears cate with the air chamber 46 when the plug .39 is unseated, as shown in Fig. 6. The

chamber 46 is supplied with air through the main passage 47 which leads to the nozzle 4. The other port 45 is adapted to partly enter a gasket 48, but not far enough to entirely out off communication with the .bore 29. The remaining opening of the port 45 is useful in permitting the escape of residual air from the bore 29 after the escape valve 15 has again closed.

A cap 49 holds all of the parts in the This includes a gasket 50 against which the step 32 of largest diameter of the bushing bears in making a tight joint with the rim of the head 3. The cap has a suitable opening which admits the valve tube of the tire. A spring 51 bears on the head 38 of the valve 39 and keeps-it seated so that no air under pressure may enter the port 44. This head has a knob 52 which is adapted to strike the roof of the chamber 46 should the valve 39 be pushed in excessively far, thereby leaving room for the passage of air from the passage 47 and preventing an interruption which may possibly be detrimental.

The operation may be brieflyreviewed to advantage. The operator, desiring to fill the air chuck to t e pressure desired. This is done by turning the hand piece 12 which has a swivel connection with the collar 18.

This collar, is fixed on the body 1015 the the extension of the springvbar 9 from ,b'e-

a tire with compressed air, will first set i neath the pointer 23.- The operator must observe the various pressure indications 16 (Fig. 8) as they come into view, stopping the turning of the hand piece 12 when the desired pressure is indicated. 7 The air' chuck is next applied tothe air tube of a tire.

The seating movement displaces the valve plug 39 so that air communication with the chamber 46 is had; The air enters the port 44 and passes down the central passage 43.

Some of the air also enters the port 45 and finally reaches the passage 28 in the set screw 24. The escape valve 15 is prevented from opening by the tension of the spring 7. This spring was put under tension by the advancement of the heel 8 during the adjustment of the spring bar 9.

When the pressure of air in the tire slight- 1y exceeds the equivalent pressure or tension of the spring 7 against the escape valve 15, the latter is unseated so that the air. may escape at the port 17. The accompanying hissing sound will warn the operator that the desired tire air pressure is reached. I The air chuck is removed and the hand piece 12 p turned in the reverse direction so as to again secrete the spring bar 9 within the body of the chuck.

While the construction and arrangement of theimproved air chuck as herein described chamber connected by a slot, means-adapted to slide in the groove and having a heel extending through the slot into the chamber, a head forming part of the body having a bore communicable with the chamber, a valve in the chamber, means engaging the valve and the heel being adapted to keep the valve seated, and means operableon the body adapted to actuate said slide means to advance the heel in said slot and chamber and thereby impart varying degrees of pressure to said seating means requiring a preponderance of air pressure in said bore before said valve will unseat. w

2. A device of the character described comprising a body having a groove and a chamber, a bar slidable in the groove-having a heel reaching into the chamber, means having a swivel mounting on the body, means providing an engagement between the swivel means and said bar to slide the bar when said means is turned, a head forming part of the body having an air pressure bore communicable with thechamber, an escape valve situated in the chamber adapted to sever communication of the bore with the chamber, and a spring situated in the chamber bearing against said valve and said heel.

3. A device of the character described comprising a body having a groove and a chamber, a bar slidable in the groove and having a heel extending into the chamber, a hand piece carried by the body, thread connections between the hand piece and slide, means by which the hand piece is swivelly mounted on the body permitting adjustment of the bar, graduations on the bar associated with said swivelling means to form an index of pressures, a head forming part of the body having a valve controlled air pressure bore communicable with the chamber, an escape valve in the chamber, and a spring between said valve and heel adapted to close the bore until the air pressure therein preponderates that of the spring.

4;. In a device of the character described, a body having a groove, a chamber and a slot between the two extending part of their length, an escape valve situated in the chamber, a spring in the chamber engaging the valve, a spring bar slidable in the groove, and a heel carried by the bar extending through the slot for engagement with the other end of the spring.

5. In a device of the character described a body having a groove, a chamber and a slot tending between the two extending part of their length, an escape valve situated in the chamber, a spring in the chamber engaging the valve,ja spring bar slidable in the groove,a heel carriedby the bar extending through the slot for engagement with the other end of the spring, a hand piece carried by the body, and thread connections between the hand piece and spring bar for sliding the lever in said groove.

6. In a device of the character described a body having a groove, a chamber and a slot between the two extending part of their length, an escape valve situated in the chamber, a spring in the chamber engaging the valve, a spring bar slidable in the groove, a heel, carried by the bar, exthrough the slot for engagement with the other end of the spring, a hand piece carried by the body, thread con nections between the hand piece and spring bar for sliding the lever in said groove, a collar fastened to the body into which one end of the hand piece extends, and means carried by the collar having engagement with said end providing a swivel connection.

7. A device of the character described comprising a body with a groove, an es:

cap e'valve incorporated in the 'body, a

spring bar slidable in the groove and having associated means for seating the valve, a

cylindrical hand piece fitted over one end ance oi the spring bar from its concealment in the hand piece as the latter is turned, and pressure indications inscribed on the spring bar appearing at an adjacent side of the swivel means indicating the approximate pressure with which the escape valve is seated.

8.'A device of the character described comprising a safety valve body having an air pressure inlet and a chamber, a valve in the chamber closing said inlet, a spring in the chamber seating the valve, a bar slidable on the body and having a heel abutted'by the spring, a handpiece swiveled on the body, and engaging means between the handpiece and bar to slide the latter I y when the hand piece is turned and thereby vary the tension of the spring.

JAMES W. PRICE.- 

